A substitute for the word "fucking". Used by pathetic hipsters, scene kids, live journal and myspace users.
Livejournal entry for Monday: "Man, my Mom wouldn't let me go to the show last night, what the eff."
"That's the effing sex."
"That's the effing sex."
by hXc Hater May 22, 2006

by wwiiggllyy September 12, 2003

by DiamondSerpant March 31, 2007

slang term meaning Efficient; something or someone is efficient, they are able to do tasks successfully, without wasting time or energy.
by Nunya Bizznis October 31, 2011

a way to say the word fuck,without getting into trouble,or it being censored,etc
comes from one of the word fucks names
the f word,f is prounounced eff,or ef,whatever,thus creating effin
mistl means fuck or fucking
comes from one of the word fucks names
the f word,f is prounounced eff,or ef,whatever,thus creating effin
mistl means fuck or fucking
by O_O-age 13 September 20, 2003

effin comes from the name of an Irish Saint - St. Eimhin, pronounced Effin. So it is actually the name of a parish in Co Limerick, Ireland and some of us are very proud of it!!!
by mary Donovan April 20, 2004

a phrase used to add emphesis right after something bad or not good occurs; you can say it in replace of the word "fuck" (ex. fuck, my cell broke!)
(and this phrase if from dodgeball)
(and this phrase if from dodgeball)
by pepper brooks August 05, 2008
